Introduction to kinetics | Energy and enzymes | Biology | Khan Academy

[@kamrannasir3871]

I wish my school teacher would have been half as good as this..

[@LiqMiPenny]

Ah, so helpful with my classes. Didn't have a clue what the teacher was talking about, but now I have a better idea.

[@hiccuphadock5059]

sals the best teacher out there

[@frederickrichard1718]

the most recent comment here is 4 years old lmao

[@parkmeadow]

@@frederickrichard1718 not anymore xdd

[@DJDunsie]

OMG you are the best chemistry teacher ever :D I never understood this before, now I do, all thanks to you.

[@hgfjyrdetryu]

KHAN ACADEMY ROCKS!!!!!!!!

[@77sarahcat]

"iogen"

[@Dschulinho]

thx man. your a good teacher, and you are a good guy, lessons for free your are awsome. thanks man

[@zeehanazad]

i reeeeeallyyyyyy love ur academy, you have know idea how helpful your videos have been!

[@babypink1021]

Thanks. PS: those people who are correcting him... if you know so much, why are you even watching this?! geez

[@FindWaldoAgain]

I finally understand! Thank you!

[@EaglesFastAndLow]

Khan for president!

[@sumbumfit]

You are an amazing explainer!!! Thank you, you've helped me with sooo much1

[@xeztan]

I

[@42230004]

I was looking for the musics by kinetics and stumbled upon this video. I watched the whole thing. Good job and thanks. It made alot of sence bc i learned chem last year but we never did kinetics. Anyways keep up the good work

[@xxjman1217xx]

How come you never did Rate Laws?

[@danymanchster1759]

rate law and reaction order and all that good stuff

[@edenabraham10]

Great way to understand the concept!

[@Pr0x1mo]

I know you just put this up, but can you put these videos in sequential order with the rest of your chemistry section? I have no idea which video comes after this one.

[@manojmaheshwari4055]

11 years back .. amazing what I feel now !

[@seannykaza9954]

Question 1. Yes, because for a molecule to be formed there must be an effective collision between its constituent atoms. Question 2. Think of it this way, if you powder something it gives more area for the other atoms or molecules to collide with it. But, if you leave something in a brick the atoms or molecules that need to interract with it are only limited to the molecules of the substance on the surface. So thus the more area available for the reaction to take place the faster the reaction.

[@42paradigms]

1. Change in concentration 2. Change in temperature 3. Change in surface area

[@hgfjyrdetryu]

intermolecular activity is not considered as a chemical reaction but a physical reaction instead since phase changes (solid -> liquid) are not chemical. however im only saying that the dissociation of NaCl APPEARS similar to dissociation when melting a pure peice of salt. one is caused by addition of energy, exciting the salt, the other is caused by dipole-ion forces. (see next post)

[@CaitlinB0000]

I'm just slightly confused by the graph you created to explain activated state and activation energy. On the video, you labeled the y-axis potential energy, but later you referred to heat helping to get up to the activated state. Does the y-axis just represent energy in general, or does heat have a way of changing potential energy that I am not familiar with? (It's late, I hope my question makes sense.) By the way, thanks for all the great videos!!!

[@DBZGotenStan]

Hydrogen boding with iodine - Still a better lovestory than twilight

[@sciencenerd7639]

great video, thank you so much

[@hgfjyrdetryu]

i think what causes dissociation is key here and if dipole-ion forces are considered as a physical process instead of chemical, then dissociation of salt in water is a physical process.

[@hgfjyrdetryu]

i dont think its a chemical reaction since NaCl is an ionic solid meaning each atom is already ionized and independent. the interaction between Na and Cl seems more intermolecular than intramolecular to me because each Na+ ion is not stuck to or permanently designated to a specific Cl- ion, you could melt a pure piece of salt and the Na+ and Cl- ions could be rearranged without going under a chemical reaction (NaCl(s) -> NaCl(l)). (see next post)

[@pixxzel]

if somebody could please answer this it would be great. What are the three different ways that the rate of a reaction can be affected, described in the video?

[@say1226]

well that is a bold assumption because it is different teaching something you know than to answer questions written by others in different manners. Although he would most likely do very well he would probably be prone to making a few errors due to wording or style of the question eventhough he understands the concepts

[@chissstardestroyer]

Reason if the temperature increases the likelihood increases is simple: temperature at the atomic scale really is the ambient energy of the atoms; so the higher the temperature, the more active they are, and the more likely they are to collide with higher force. Course these things never collide, and the reason for that is at the scale they are at, the electromagnetic force is easily sufficient to stop them from impacting; had they impacted, you'd have a nuclear explosion- and that'd be really bad for the scientists in the lab to put it mildly, as well as the lab in question. Frankly; I doubt very strongly you'd find anything left of the scientists or their experiment if that happened. And that's *if* you can even go near there; due to the radioactive nature of the area post an atomic explosion, as well as finding the epicenter thereof.

[@yinghouguan5591]

Can anybody recommend me a page or book where i can i find worked examples in chemical kinetics?

[@JafenKtair]

feet

[@funkydiva12]

hey which is the video that teaches us about the rate determinign step?

[@joshuapumarol]

Saves my life every time

[@cloonex1]

Very well presented, however a bit slow to the point

[@NASSAfellow]

@Jordan5066 Just to note that although his equation was balanced, he said "two moles of hydrogen" and "two moles of iodine" which was technically incorrect since H2 is a mole in itself, and the same goes with I2. Correct phrasing: One mole of Hydrogen and one mole of iodine make 2 moles of Hydrogen iodide. H2 is one molecule, and I2 is also a single molecule. It was a long time ago but maybe I was trying to get at that.

[@FauItyLogic]

@Pr0x1mo There are playlists on the youtube channel. Makes watching continuous.

[@faeinthebay]

Works fine for me.

[@vijayjuneja8534]

thnxx...........

[@KawaiiStrawberry33]

I didn't think probabilistic was a word, but apparently it is!

[@sequence0902]

NaCl and water forms ion dipole interaction and not polar dipole bonds, no?

[@chissstardestroyer]

These chemicals aren't operating by chance; they are attracted to eachother via electromagnatism- very strongly attracted at that; they are frankly pulled together, due to the electrical charges in the subatomic parts of the atoms.

[@jijulpark3703]

you sound like anthony bourdain

[@noledjokovic1368]

This guy would get a perfect score on the MCAT

[@name.7098]

What is MCAT?

[@sunitatailor6434]

its epic

[@sub-zero9772]

very good

[@NASSAfellow]

@Jordan5066 Silly mistake from me - at the time I must have been a bit tired (was doing a hardcore chemistry enhancement course which was really energy draining). Thanks Jordan.

[@MrYasser643]

Search for it>i didnt cuz i dont need to watch it,i've already studied it,search for it.

[@hupper12345]

iogen lol thanks dude

[@CliveReyes]

He put the dot on the C.. haha!

[@minde6794]

and addition of catalyst..

[@u218064]

isn't it decrease surface area to increase rate of rxn????

[@prospectivemedic3750]

Hi Sal, or anyone else on this episode. Am i missing something by asking this? How do you get from H2 ----- I2 = 2HI? I feel like I am not understanding this part of the process or have missed something from earlier episodes

[@prospectivemedic3750]

As in, if I was given 2HI in a formula, how does H2 + I2 = 2HI? Thanks

[@prospectivemedic3750]

Unless there is a lecture on Chemical equilibrium I have missed?

[@racquelsabesaje4562]

hydrogen mix other chemicals had active effects either effective

[@SlushGuppy]

What will Oxygen think!? Oh man, this is getting good.

[@Sk.2500]

I'm here because I was hearing drum n bass and I tought this was dnb too, dang school shit is chasing me ahhhhhhhh

[@fleshcookie]

6:28. Highagen Iodide? I thought it was hydrogen

[@MrYasser643]

Its an introduction to Kinetics..not explainin' of thermodynamic!..u can find what u want in next videos Senior

[@Pr0x1mo]

Nah, np, a couple hours after i posted that (4 months ago) he put it into a playlist.

[@shyambhavi10]

This is the oldest comment that I ever saw on utube

[@Pr0x1mo]

@@shyambhavi10 I'm still here, B.

[@shyambhavi10]

@@Pr0x1mo woah! I didn't expect a reply... btw great:)

[@Pr0x1mo]

@@shyambhavi10

[@MphatsoLiandisha]

This year too?

[@username6333]

@Pr0x1mo Go to his site, the videos are in sequential order there.

[@NASSAfellow]

In the beginning of the video you said '2 moles of hydrogen and 2 moles of Iodine' WRONG! It is one mole of hydrogen and one mole of Iodine which produces two moles of HI. You have two atoms of each, not two moles.

[@dawangstaman]

watched

[@curtpiazza1688]

Great! 😂

[@bensonwu1238]

Why is it Chemistry?

[@td6063]

hydrogen is like a confused chick between two guys

[@ThePeterDislikeShow]

Don't drink soda.

[@Kafka121]

ah yes the all new Iogene

[@Pr0x1mo]

@15987532147896325 I know the original website, but when this video first came out, it wasn't in order with any other video, it is now, obviously.

[@hemlock501]

I'm sure you are a nice guy and I like your videos. I don't; however, love you.

[@badamc]

there's no audio.... anybody else?

[@0o0o0123]

Kinetics? You were going on too much about thermodynamic bro, better of explaining rate determining step, the rate expression and constant and order of reactions, video was good but irrelevant to kinetics

[@peacefindersimply5001]

Your thinking of kinetic energy, kinetics is a bit different

[@privateuser6590]

Why is Khan drawing testicles at 3:13

[@GaryMFOak69]

bearsemen you must be fun at parties

[@frederickrichard1718]

@@GaryMFOak69 LMAOO

[@StarWarsRealTalk]

One guy is failing his exam

[@KillerZero259]

@HackneyEquine dude are you coming out of the closet? lol

[@cockedhammer72]

should be new NBA team take 2 make 1 . Knicks/Celtics = Kinetics

[@Oadevour]

knicks + nets= Kineticks

[@RImAPhan]

Salman Khan is a GOD!